ItItFrFrDeDe
Schweizerische Gemmologische Gesellschaft
  • Gemmology
    • Knowledge
    • Diamonds
    • Terminology
    • The 4 C's
    • Precious stones
    • Colours
    • Pearls
    • Cultured pearls
    • Treatments
  • About us
    • History
    • Commitee
    • Objective
    • Become a member
  • Current
  • Links
Inclusions of hematite in feldspar (sunstone), India
Inclusion of apatite in ruby from Tanzania
Inclusions of hematite in aquamarine, Tanzania
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, crossed polarisers
Two-phase inclusions in tourmaline from Namibia
Two-phase inclusion in amethyst, Brazil
Twin-crystal of chrysoberyl
Colour zoning in ruby from Mong-Shu, Burma

Thank you for your message

We will get back to you as soon as possible.


 
 
  • Become a member
  • Contact
  • Internal
  • Print page

Sitemap
Imprint
Data protection
Conditions of use

© SGG/SSG 2025

 

Our sponsors for 2025:

 
 
 
 
System Eickhorst
 
 
FAERBER
 
 
FERRARI
 
 
System Eickhorst
 
 
GRS
 
 
GÜBELIN
 
 
SSEF
 
 
Wild & Petsch
 
 
 
 
Christian Dunaigre
 
 
 
  • Become a member
  • Contact
  • Internal
  • Print page